'Bed' in the Bible

but there is a God in heaven who reveals secrets, and he has made known to the king Nebuchadnezzar what shall be in the latter days. Your dream, and the visions of your head on your bed, are these:

as for you, O king, your thoughts came [into your mind] on your bed, what should happen hereafter; and he who reveals secrets has made known to you what shall happen.

I saw a dream which made me afraid; and the thoughts on my bed and the visions of my head troubled me.

Thus were the visions of my head on my bed: I saw, and behold, a tree in the midst of the earth; and its height was great.

I saw in the visions of my head on my bed, and behold, a watcher and a holy one came down from the sky.

In the first year of Belshazzar king of Babylon Daniel had a dream and visions of his head on his bed: then he wrote the dream and told the sum of the matters.